{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xededec6add2fdeea4bb539986258ceb4422ff0dff887ddc130b2e07f68036a26",
    "signature": "0xe4221f720cdb0fece0ec671532bec620c2db7ed4bacfb5de27d2f56f1f25ce371dee8b751d06b4401339c92785f8381eed94050f467429a6a4aa032c472466391b",
    "signer": "0x11b1a5EB9302bDf9747fc089df1Fe0935adF8F05",
    "userId": "154619986"
  }
}